Eudragit S100 pH hbFGF/haFGF [10] Alginate Ca++ Lipase Amilas [11, 12] Poly(propylene oxide)−phenyl−poly(ethylene glycol)/PPO (n) 33, PPO (n) 50 Temperature Carbonic anhydrase [13, 14] Poly(N-isopropylacrylamide) Temperature Carbonic anhydrase lysozyme [15, 16]